I thought I was done...

nanettecole

My 3 yr old ds was almost fully potty trained except for night. He even told me when we were out or in the car, All of the sudden he started peeing in his big boy pants at least once a day. If he's naked he always goes on the potty but, now even if I don't take his diaper off immediately in the morning he'll poop in that. I don't know what to do. He's supposed to start preschool in January. Any ideas? Am I doing something wrong?